The discrete time mathematical model of a switched TIG welding power source is established. The arc ignition process, its property, current wave form and arc stability are analysed.
本文建立了开关式TIG焊电源的离散时域数学模型，分析了电弧引燃过程、引弧性能、电流波形特点和电弧稳定性。
Arc current reducing rate and arc voltage at the time of arc discharging are established for every mathematical model.
得到电弧放电瞬间每一模型下的电流变化率和电弧电压。
A circuit for arc ignition with low current is designed in this inverter and a mathematical model of the circuit is studied.
在该弧焊逆变器中设置了小电流引弧电路，建立了该电路的数学模型，成功地实现了引弧电流软启动。
A circuit for arc ignition with low current is designed in this inverter and a mathematical model of the circuit is studied.
在该弧焊逆变器中设置了小电流引弧电路，建立了该电路的数学模型，成功地实现了引弧电流软启动。
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